The Mystery of Bramblebrook's Forgotten Tunnel. The Curio Club Mysteries, #2

Beneath the peaceful streets of Bramblebrook lies a world of secrets. And the Curio Club-Lila, Mia, Toby, and Jake-are the guardians of them all. Life has been quiet since they discovered the Heart of Bramblebrook, but when the village prepares for its annual Summer Festival, a strange new mystery arises. An old stone statue, long covered in moss, is suddenly restored to gleaming white, and a mysterious message painted on its base warns of shadows, speaking stones, and a secret about to be taken. As the full moon approaches, the friends realize they aren't the only ones who know about the tunnels beneath the village.
A mysterious woman in black has arrived, claiming to be descended from a legendary figure from the village's past, and she will stop at nothing to claim the Heart as her own. With time running out, the Curio Club must follow a trail of clues, raven symbols, and hidden passages to protect what they love. But will they be ready when the statue finally speaks?